Study of decoupled charge blasting based on high-speed digital image correlation method

Yang, Renyu; Ding, Chuanxian; Yang, Liyun; Lei, Zhen; Zheng, Changda

doi:10.1016/j.tust.2018.09.031

Cited by 57 publications

(20 citation statements)

References 23 publications

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“…Thus, research is emerging to ensure energy efficiency and the responsible use of natural resources [110,111]. Therefore, today's economies need flexible systems that allow them to evolve quickly and efficiently, in line with the speed of technology [112,113]. Table 3 shows the main keywords of the most productive institutions on the sustainable management of DT in HE, during the period analyzed, 1986-2019.…”

Section: Publications By Author Institution and Countrymentioning

confidence: 99%

Sustainable Management of Digital Transformation in Higher Education: Global Research Trends

et al. 2020

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Digital transformation in the education sector has implied the involvement of sustainable management, in order to adapt to the changes imposed by new technologies. Trends in global research on this topic have been analyzed and studied, during the 1986–2019 period. To achieve this purpose, a bibliometric study of 1590 articles from the Scopus database has been applied. The results provided data on the scientific productivity of authors, journals, institutions, and countries that contribute to the development of this research area. The evidence reveals an exponential trend, with special interest in the last five years. The main categories are Social Sciences and Environmental Science. The most productive journal is Sustainability. The author with more articles is Mulder, from The Hague University of Applied Sciences. The most productive institution is Delft University of Technology. The USA is the country with the most academic publications and international collaborations in its studies. The main keywords used in the articles are “sustainability”, “sustainable development”, “higher education”, “innovation”, “technology”, “environmental technology”, “technological development”, and “environmental management”. Global research has followed a growing trend, with optimal publication levels in recent years.

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Section: Publications By Author Institution and Countrymentioning

confidence: 99%

Sustainable Management of Digital Transformation in Higher Education: Global Research Trends

et al. 2020

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“…is model is subject to a plastic kinematic model. Due to a large number of numerical simulation tests involved in this study, the adoption of this model can achieve high calculation efficiency; furthermore, this model can be used to realize the simulation of the explosion cavity by defining failure strain parameters [25][26][27]. e detailed parameters of the stratum are summarized in Table 2.…”

Section: Materials Parameters and Modelsmentioning

confidence: 99%

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Qiu

Zeng

et al. 2020

Advances in Civil Engineering

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Explosives are the most common seismic source in seismic explorations, whose excitation effect is closely associated with their properties, weight, buried depth, and charging constitution. This study analyzes the influence of seismic source parameters on the features of the explosion wavelet. The explosion process of the seismic source in marine carbonate is numerically simulated with the finite element software LS-DYNA. We consider three parameters, including buried depth, charge weight, and decoupling coefficient. To verify the simulation outcomes, we also carry out field observations. The appropriate buried depth of the explosive should be determined according to stratum lithology. As the charge weight increases, low-frequency energy of the source wavelet increases rapidly. The optimum charge weight is 16–18 kg, and the ideal charging structure is in a concentrated, short-column shape. Compared with the buried depth and charge weight, the decoupling coefficient shows more noticeable influence on the excitation effect of the source wavelet, and the optimum coefficient lies between 2.5 and 3. The results of this study may provide reference data for designing explosion parameters in field seismic explorations.

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“…Another reason for the unsatisfactory blast results is that many basic parameters in rock blasting have not been well determined such as crack propagation velocity, gas penetration speed, and characteristics of stress waves induced in the rock. To understand the mechanism better and improve blast results, various model blasts have been carried out, dealing with stress waves, gas pressure, and fragmentation (e.g., Field and Ladegaard-Pedersen 1971;Bergmann et al 1973;Fourney et al 1974Fourney et al , 1981Dally et al 1975Dally et al , 1993Dally et al , 2006Katsabanis et al 2006Katsabanis et al , 2014Tilert et al 2007;Johansson and Ouchterlony 2013;Onederra et al 2013;Sun 2013;Fourney 2015;Liu et al 2018;Chi et al 2019a, b, c;Yang et al 2019;Zhang et al 2020a, b;Mao et al 2020;Jeong et al 2020). In a number of the previous model blasts, a high-speed camera was used to monitor the blasting process (Chi et al 2019a, b, c;Zhang et al 2020a, b;Jeong et al 2020) and the initiation times of the earliest cracks and gas ejection of a few specimens were approximately determined (Chi et al 2019a, c).…”

Section: Introductionmentioning

confidence: 99%

Fracture Initiation, Gas Ejection, and Strain Waves Measured on Specimen Surfaces in Model Rock Blasting

Zhang

Qiao

et al. 2020

Rock Mech Rock Eng

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Crack velocity, gas ejection, and stress waves play an important role in determining delay time, designing a blast and understanding the mechanism of rock fragmentation by blasting. In this paper, the emerging times of the earliest cracks and gas ejection on the lateral surfaces of cylindrical granite specimens with a diameter of 240 mm and a length of 300 mm were determined by high-speed photography, and the strain waves measured by an instrument of dynamic strain measurement during model blasting. The results showed that: (1) the measured velocity of gas penetration into the radial cracks was in a range of 196–279 m/s; (2) the measured velocity of a radial crack extending from the blasthole to the specimen surface varied from 489 to 652 m/s; (3) the length of strain waves measured was about 2800 µs, which is approximately 1000 times greater than the detonation time. At about 2850 µs after detonation was initiated, gases were still ejected from the surface cracks, and the specimens still stood at their initial places, although surface cracks had opened widely.

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Study of decoupled charge blasting based on high-speed digital image correlation method

Cited by 57 publications

References 23 publications

Sustainable Management of Digital Transformation in Higher Education: Global Research Trends

Sustainable Management of Digital Transformation in Higher Education: Global Research Trends

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Fracture Initiation, Gas Ejection, and Strain Waves Measured on Specimen Surfaces in Model Rock Blasting

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